Flashcards in Unit 6 Deck (18)
What was Von Helmont testing with his willow tree experiment? What was the result?
He wants to see if plants grow by eating soil through their roots. The result is the tree grew eventually by eating soil
Define the law of conservation of mass
Mass cannot be created nor destroyed. It only changes form.
Describe the experiment used by Joseph priestly to discover oxygen
He placed lit candle in a sealed jar and when he did that the flame went out because there wasn't any oxygen and it couldn't breath
List the primary constituents of air
1- 78% nitrogen
2- 21% oxygen
3- 0.9% argon
4- 0.03% carbon dioxide
5- 0.02% water
What did Jan Ingenhousz discover oxygen
Plants need sunlight in order to release oxygen
Based on the work of Nicolas de Saussure, what are the two primary sources of mass for plants?
Water and carbon
Plants use light to make tissues
Stored energy that exists as a result of position or chemical structure
Energy in motion
Define each of the 3 wavelengths of energy released by the sun
A. Visible light- we are able to detect w our eyes
B. Ultraviolet- has a shorter wavelength than visible light and is able to penetrate living tissue
C. Infrared(heat)- has a longer wavelength than visible light
The primary location of photosynthesis is _______, which contain the organelle _________, each of which is filled w the green pigment _______.
Leaves; chloroplasts; chlorophyll
What organism is believed to be the origin of the chloroplast
Write the full reaction of photosynthesis
Carbon dioxide and water are used to synthesize glucose, which can be used to produce starch or cellulose. C6H1206 6H20 602
What are the light dependent reactions of photosynthesis
They can only occur when sunlight is available
Explain what happens in each photosystem of chloroplasts
Photosystem 2- A photon of light strikes and arrangement of chlorophyll and it causes the excitement of electrons and the splitting of water
Photosystem 1- where the electron is passed and is re-energized by another futon and used to generate an electron carrier called NADPH
What wavelength of light does the Clora Phil and photosystem one and to respond best to?
How is ATP generated during the light dependent reactions?
And electron transport chain and chemiosmosis, which is similar to what happens during cell respiration